import random
import string

from PIL import Image, ImageDraw, ImageFont, ImageFilter


def checkCode(width=120, height=30, charLength=4, fontFile='Monaco.ttf', fontSize=28):
    code = []
    img = Image.new(mode='RGB', size=(width, height), color=(255, 255, 255))
    draw = ImageDraw.Draw(img, mode='RGB')

    def rndChar():
        """
        生成随机字母和数字
        :return:
        """
        characters = string.ascii_letters + string.digits  # 包含大小写字母和数字
        return random.choice(characters)

    def rndColor():
        """
        生成随机颜色
        :return:
        """
        return random.randint(0, 255), random.randint(10, 255), random.randint(64, 255)

    # 写文字
    font = ImageFont.truetype(fontFile, fontSize)
    for i in range(charLength):
        char = rndChar()
        code.append(char)
        h = random.randint(0, 4)
        draw.text([i * width / charLength, h], char, font=font, fill=rndColor())

    # 写干扰点
    for i in range(40):
        draw.point([random.randint(0, width), random.randint(0, height)], fill=rndColor())

    # 写干扰圆圈
    for i in range(40):
        draw.point([random.randint(0, width), random.randint(0, height)], fill=rndColor())
        x = random.randint(0, width)
        y = random.randint(0, height)
        draw.arc((x, y, x + 4, y + 4), 0, 90, fill=rndColor())

    # 画干扰线
    for i in range(5):
        x1 = random.randint(0, width)
        y1 = random.randint(0, height)
        x2 = random.randint(0, width)
        y2 = random.randint(0, height)

        draw.line((x1, y1, x2, y2), fill=rndColor())

    img = img.filter(ImageFilter.EDGE_ENHANCE_MORE)
    return img, ''.join(code)


# if __name__ == '__main__':
#     img, codeStr = checkCode()
#     print(codeStr)
#
#     with open('static/code.png', 'wb') as f:
#         img.save(f, format='png')
